* {
    margin: 0;
    padding: 0;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
}

.main-wrapper {
    padding-left: 300px;
}

.aside-nav {
    position: fixed;
    top: 0;
    bottom: 0;
    width: 300px;
    background-color: #333;
    color: #fff;
}

.aside-nav .nav-title {
    height: 70px;
    line-height: 70px;
    text-align: center;
    font-size: 24px;
    border-bottom: 1px solid #222;
}

.aside-nav .nav-list .parentNav {
    height: 70px;
    line-height: 70px;
    padding: 0 16px;
    font-size: 20px;
}

.aside-nav .nav-list .parentNav:hover,
.aside-nav .nav-list .item.active {
    background-color: #222;
}

.aside-nav .nav-list .parentNav i {
    font-size: 20px;
}

.aside-nav .nav-list .subNav li a {
    color: #fff;
    display: inline-block;
    width: 100%;
    height: 40px;
    box-sizing: border-box;
    line-height: 40px;
    padding-left: 60px;
}

.aside-nav .nav-list .item.active .subNav {
    display: block;
    background-color: #333;
}

.aside-nav .nav-list .subNav {
    display: none;
}

.aside-nav .nav-list .subNav li a:hover {
    background-color: #222;
}